And now Brad has moved into the world of beauty and grooming to continue working for those causes.
The star has come together with Kiehl's to form a charity called JPF Eco Systems that will support global environmental initiatives. The first Kiehl's product launched to generate contributions is Aloe Vera Biodegradable Liquid Body Cleanser, £15, which is free from parabens, sodium lauryl sulphate, sodium laureth sulphate and dyes.
It also breaks down within 28 days so there is no environmental impact from the formulation, while the plastic used for the bottles is derived from food and drink containers retrieved in recycling programmes. The labels are environmentally friendly, too.
Best of all, 100 per cent of net profits – estimated to raise $1m - from sales of the cleanser will go to the charity and be used to help fund the construction of environmentally sustainable, affordable housing for the displaced victims of Hurricane Katrina.
The cleanser is set to go on sale in November; call 020 7240 2411 for stockists.