Nuclear waste is dangerous.
Nuclear waste is regulated by government agencies.
Highly dangerous nuclear waste is buried until it is no longer dangerous.
War causes death and environmental problems.
Bombs ruin buildings and create a lot of garbage.
Global warming means the average temperature of the earth and the oceans is increasing.
The ice at the North Pole and the South Pole is melting.
Global warming is caused by burning fossil fuels and cutting down forests.
Global warming increases heat waves, droughts, and floods.