[allAfrica] Ugandan engineer and innovator Arthur Woniala is passionate about people, entrepreneurship and sustainable solutions to everyday challenges. In 2007 with the help of two friends, he founded Khainza Energy -- a small business committed to providing clean, safe and affordable cooking fuel to replace the wood and charcoal fuels that cause respiratory diseases and environmental damage, including destroying forests and eroding soils. He told AllAfrica's Nontobeko Mlambo how Covid-19 is affecting