ACROSS
5.Greenhouse gases
6.Deforestation
8.Landfill
9.Climate change
10.Microplastics
11.Environment
DOWN
1.Atmosphere
2.Fossil fuels
3.Emissions
4.Solar power
5.Global warming
7.Recycling
Letters in the green boxes: o l u n i l p t
The word is: pollution
Clue: Introduction of harmful substances into the environment, causing damage to people, animals, and plants.