What term best describes pollution that crosses national borders?

In 1986, there was a major meltdown at Chernobyl, which was in the Soviet Union. What nation is Chernobyl now in?

More and more goods were produced by machines instead of by hand as a result of what?

When an oil tanker spills it is an example of what kind of pollution?

Everyday pollution, like car exhaust is an example of what kind of pollution?

Smoke from coal burning power plants can create smoke and soot that can lead to what problem?

A river and all the streams that feed into it are considered what?

What caused the Chernobyl accident?

About 70% of the radioactive dust from Chernobyl fell on what neighboring country?

Scientists in which country were the first to discover and announce the meltdown at Chernobyl?

What is the name of the device that clicks when it measures radiation?

What is the name of the highly industrialized area of Europe known for producing a lot of pollution?

What three nations are a part of the Black Triangle?

In the 1950s, acid rain was no longer a major urban problem why?

These devices chemically remove the sulfur dioxide from the gases that are leaving the smokestack.