Reading: Land Degradation

Good evening, my dear English learners? Let's do some reading tonight.))))
Here is the link and some questions for comprehension:
https://theconversation.com/on-dangerous-ground-land-degradation-is-turning-soils-into-deserts-94100

Key words:
Look up the definitions and all parts of speech(word family)
1. degradation
2.desertification
3.malnutrition
4.deregulation
5.tundra
6.biodiversity
7.inhabitable
8.systemic
9.deregulate
10.ecological

Comprehension questions:
1. What are the new evidences about land degradation?
2.What are the five key ecosystem functions?
3. What effect does land degradation have on humans?
4. How many people will be living in drylands by 2050?