Impact, irreversible-Dirty cotton1
Pests build up resistance to chemicals, farmer borrows money to buy more chemicals than before, and farmer gets less profit from crop, repeat until farmer is destitute. In parts of India agricultural chemicals take up 60% of the farmer's production budget.
In fact, 2.5% of all farmland worldwide is used to grow cotton, yet 10% of all chemical pesticides and 22% of insecticides are sprayed on cotton. Do a bit of maths, and you find that eight times more pesticide is used on one hectare of conventional cotton, than on other crops.
There are 60 million child labourers in India - nearly the population of the UK. Cotton is the "dirtiest crop" - 55% of all synthetic pesticides in India are used in cotton farming. 30 minutes. 60 million accounts to 55%.