The wildfires in the Pantanal wetlands, the world's largest tropical wetland, have raged the region since August, threatening the habitats of local wild lives.
To fight the flames, a makeshift command post has been set up, bringing together nearly 100 firefighters, environmentalist and staff members from wildlife services.
According to a group of firefighters, they had to take a boat for approximately 40 minutes to reach a site across the river to put out the fire there, which started in early August but has reignited repeatedly afterwards.
Such recurring fire incidents are commonly seen during the dry season in the Pantanal wetlands over the past years.
Water levels decrease during the dry season and rise again in the rainy season in the Pantanal wetlands. Yet, the dry season has lengthened while the rainy season has shortened in recent years, with insufficient rainfall during the latter.
As a result, the upstream areas that are supposed to supply water to the wetlands are unable to provide adequate water now.
"The water supply to the wetlands has decreased, the time of water duration in the region is shorter. As a consequence, the wetlands dry out more quickly as the time they are exposed to the sun get longer, making it easier for these fires to get in," said William Assuncao, an analyst from the Chico Mendes Institute for Biodiversity Conservation, who has been working on forest fire prevention since 2010.
Biologists said the fires in the Pantanal wetlands not only have directly cause the deaths of numerous animals, but also severely damaged their habitats.
"The hyacinth macaw primarily feeds on two types of fruits that come from two specific palm trees in the Pantanal region. Wildfires that destroy these fruits prevent the macaws from feeding. Additionally, the wildfire has also devastated their nests. These birds stay on some large trees, so when the fire passes and the trees fall, these macaws would lose their nests," said biologist Bruno Henrique Grossi Carvalho.
Rampant wildfires threaten eco-system in Brazil's Pantanal Wetlands
Rampant wildfires threaten eco-system in Brazil's Pantanal Wetlands
China unveiled a large wind-assisted propulsion system for ships in the coastal city of Dalian, northeast China's Liaoning Province, on Friday, marking a major leap forward for the country in the field of high-end vessel marine environmental protection equipment.
The wind-assisted propulsion system - rotating sail system (WAPS-RSS), is developed by Luoyang Ship Material Research Institute of China State Shipbuilding Corporation Limited (CSSC).
The system's rotor has diameter of 5 meters, is 35 meters high, and weighs 150 tons.
Experts say that the system can efficiently capture wind energy while the ship is sailing, providing additional thrust for the vessel.
On average, it can save fuel consumption by 5 to 25 percent for large ocean-going vessels, and lower carbon emissions accordingly.
It relies on the Magnus effect, which is much like a loop in table tennis, featuring a rapidly spinning sphere that causes the surrounding air to rotate. Pressure decreases on the side with faster airflow and increases on the side with slower airflow, creating a lateral pressure difference that generates lateral thrust.
"Standing on the deck, the powerful thrust generated by its rotation assists the ship's sailing. Our system - the world's largest rotary sail - reaches a maximum rotational speed of 180 revolutions per minute and can generate a maximum of 355 kilonewtons of thrust. Additionally, the system's intelligent control integrates multiple sensors to detect real-time wind and ship conditions. Through smart algorithms, it automatically adjusts to maintain optimal performance at all times, maximizing the utilization of wind energy," said Guo Yu, vice president of SunRui Marine Environment Engineering Company Limited under Luoyang Ship Material Research Institute.
Not only does the system's performance meet international advanced standards, but the project team has also overcome a series of engineering challenges, including the fabrication of giant composite structures, complex system integration, and intelligent coordinated control.
Compared with mainstream international technological approaches, it offers greater production efficiency and cost advantages.
Currently, the system has secured its first batch of orders and will complete actual vessel applications as scheduled.
China unveils large wind-assisted propulsion system for ships
