environmental studied assignment fill in the blank

The question is in the PDF file, just the question and just fill in the blank from the PDF.

Here is the video that you need to watch to do the questions:

Nuclear Energy 101: https://www.youtube.com/watch?v=44ovdxOvP_A

3 Miles Island: https://www.youtube.com/watch?v=eGI7VymjSho

Returning to Fukushima Daiichi: https://www.youtube.com/watch?v=zwk_53DEp44

The Hanford Nuclear Power Plant – Amercia’s Chernobyl: https://www.today.com/video/-america-s-chernobyl-inside-the-most-toxic-place-in-the-nation-819787843950

Video from last week that might help for this assignment:

Coal, Oil, and Natural gas:https://www.youtube.com/watch?v=GEhSHPemt0c&feature=youtu.be

Lecture 4: The document is below

Homework support article:

The Economics of Nuclear Energy: http://www.world-nuclear.org/information-library/economic-aspects/economics-of-nuclear-power.aspx

Chernobyl 30 Years Later – How the Disaster Changed the World of Nuclear Power: https://www.lifegate.com/people/lifestyle/chernobyl-30-years-later

The Chernobyl Disaster May Have Build a Paradise: https://www.wired.com/story/the-chernobyl-disaster-might-have-also-built-a-paradise/

PG&E TO CLOSE DIABLO CANYON NUCLEAR PLANT: https://www.sfgate.com/business/article/End-of-an-atomic-era-PG-E-to-close-Diablo-Canyon-8314258.php