Explain the differences between nonrenewable energy sources such as petroleum products and renewable energy sources like hydroelectric and solar energy sources.

Renewable sources can be used again and again. Non renewable sources can't be used again.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this