Infrastructure, because it's not a part of the environment, it's not a form of transportation, not a service either. Thus the only remaining answer is Infrastructure
<h2>
Answer:</h2>
1: Bhopal Gas Tragedy, India
2: Deep Water Horizon Oil Spill, Gulf of Mexico
3: Chernobyl Meltdown, Ukraine
4: Fucushima Meltdown, Japan
5: Global Warming, The Third Planet from the Sun
<h3>
Explanation: on number 4 it is a "k" instead of a c it just didnt let me answer it like that.</h3>
