What is the main idea of the news item? [originaltext] An environmental repor

An environmental report predicts global warming will bring more days of extreme heat. From the record-setting heat in Russia to the heavy rains in Pakistan and the devastating mud slides in rain-soaked China, many climate scientists predict extreme weather will become more common as the earth gets warmer.
    "As the planet warms, the atmosphere can actually hold more water and so when it does rain, we’re getting more heavy rainfall events and that’s gonna be really devastating." Climate scientist Amanda Staudt of the U. S. based National Wildlife Federation co-authored the private organization’s 2010 report on extreme heat in the U. S. She found many of the cities along the East Coast of the U. S. , when compared to average temperatures, have twice as many days that have reached over 32 degrees Celsius.
    Staudt and many other scientists say pollution increases carbon dioxide in the atmosphere, and that traps heat and causes global warming.