States create their own laws, states have their own constitution, land and county governments. The state law stands unless a federal law overwrites it. States have their own transportation departments (make the roads, plan the roads, repair the roads).
1) reduce the number of trips you take in your car
2) reduce or eliminate fireplace and wood stove use
3) avoid burning leaves, trash, and other materials
4) avoid using gas-powered lawn and garden equipment
5) buying fewer things that are manufactured using fossil fuels
The NAFTA is going to increase the pollution. This will lower the U.S. environmental standards. This will also cause a huge amount of pollution in Mexico.
It is true. Changes in rainfall and other forms of precipitation are one of the most most critical factors determining the overall impact of climate change. Rainfall is much more difficult to predict than temperature but. Seasonal projections of both temperature variables reflect lower robustness and suggest a higher future increase in winter temperatures than in other seasons.
Ancient Egypt was concentrated on the Nile River.