Chanting “No more tear gas,” dozens of Hong Kong families with young children are marching to oppose the government’s handling of protests on the eve of keenly contested local elections.

Riot police have fired more than 9,000 rounds of tear gas since protests began roiling the Chinese territory in June, often in crowded areas and also near schools. The government says there is no evidence of any health risks and refuses to reveal the chemical composition of tear gas.

More Images
A child holds a sign reading "Urge the government to immediately respond to citizens' demands to stop using chemical weapons" during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Chanting “No more tear gas,” dozens of Hong Kong families with young children are marching to oppose the government’s handling of protests on the eve of keenly contested local elections.

A woman holds a child during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Walking with her 5-year-old daughter, Ku says people are worried about the long-term impact of tear gas.

Parents and children participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A man holds a boy wearing a shirt reading "Hong Kong" during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A man holds a boy wearing a shirt reading "Hong Kong" during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children wearing face masks participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children wearing face masks participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A child holds a sign during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A child holds a sign during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children wearing face masks participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children wearing face masks participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children gather during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children gather during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

With police now buying canisters from China, one participant in Saturday’s march, Emily Ku, says she fears tear gas could contain cancer-causing dioxin.

A child holds a sign reading "Urge the government to immediately respond to citizens' demands to stop using chemical weapons" during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A child holds a sign reading "Urge the government to immediately respond to citizens' demands to stop using chemical weapons" during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Walking with her 5-year-old daughter, Ku says people are worried about the long-term impact of tear gas.

A woman holds a child during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A woman holds a child during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A man holds a boy wearing a shirt reading "Hong Kong" during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A man holds a boy wearing a shirt reading "Hong Kong" during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children wearing face masks participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children wearing face masks participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A child holds a sign during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

A child holds a sign during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children wearing face masks participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children wearing face masks participate in a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children gather during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)

Parents and children gather during a rally to protest against the exposure of children to tear gas by police in Hong Kong, Saturday, Nov. 23, 2019. President Donald Trump on Friday wouldn't commit to signing bipartisan legislation supporting pro-democracy activists in Hong Kong as he tries to work out a trade deal with China. (AP PhotoNg Han Guan)