A different take on climate change

"Our rain used to be more reliable," Amai Moses said to me when I visited her many years ago. We were seated in her round thatched kitchen, whose walls were made of mud. The smoke drifted up and out through the roof. The inside thatch was black from years of smoke passing through. All around the hut aA  few maize cobs hung,hung from the rafters, grown to eat green mealies not for grain. The smoke kept them free of weavils. This was the seed for next year. On a shelf were many jars all filled with different seed. I counted over 30. Amai Moses aswas one of the few seed custodians left in the area. The government's relentless drive to push 'modern' farming had sidelined people like Amai Moses. Mixed and diverse cropping was considered backward and unpatriotic by the government extension staff. So Amai Moses did her cropping in a field hidden from public view. 

"That was when we had more trees. Trees bring rain. Yet you can't receive the master farmer award if you have even one tree in your cropping areas," continued Amai Moses. Was she opening up to me because I was an outsider who had shown interest in her mixed cropping fields? Who didn't think she was 'backward'? We spent a long time discussing all her different crops and the varieties of each that she grew and what each was good for. That was over 30 years ago. Since then tree removal has speeded up all over the country.

I came away thinking about Amai Moses' remark on trees. Did cutting of trees really affect local rain? Wasn't rain affected by much bigger forces? I puzzled over this for many years and it was only when I learnt about the role of the small water cycles, especially for places well inland from any ocean, that I began to really understand the role of trees, and in fact all vegetation, in the climate. Understanding (to some extent!)  the part the small water cycle plays has been one of my biggest insights into climate change and their potential to help the climate cool the Earth and build local resilience. Amai Moses knew that - we underestimate indigenous knowledge to our peril.