Chernobyl What gasses/toxins did it release? Where and how? (use scientific word

Chernobyl
What gasses/toxins did it release? Where and how? (use scientific words and symbols or these gases/toxins.
How has it impacted the environment?
What effects did it have in the past when it happened and today?
What are the long term effects
What did they do to reduce the effects
What steps are the government or environmentalists are taking to help reduce or avoid these events from happening again
2000 words
20 scientific sources
APA (Griffin, 2000) or numbered style [1]