The snow cover in the Northern Hemisphere and floating ice in the Arctic Ocean have decreased. Globally, sea level has risen 4-10 inches over the past century. Several emissions scenarios have been developed based on differing projections of these underlying factors. Increasing concentrations of greenhouse gases are likely to accelerate the rate of climate change. Scientists expect that the average global surface temperature could rise 1.6-6.3F by 2100, with significant regional variation.
Sea level is likely to rise two feet along most of the U.S. coast.
We can each do our part by using less energy and choosing the kinds of fuels and electricity that release the least CO 2 . In other words, while no one of us alone can solve the problem without action by others around the world, individual families and companies can make investments today that are economic winners for them while contributing to a global solution. The Climate System EPA provides the best introduction to climate change, and describes what steps are already being taken in the US at the federal and local levels. This site is sponsored by U.S. EPA and includes an extensive database you can search for useful information on sustainable energy and other practices. This site is a virtual library on climate change, including materials related to countries with developing economies.