MENNA A. FAROUK AHMED Samir zips expertly through the Cairo traffic in his tuk-tuk, making a meagre living by ferrying Egyptians around the chaotic mega-city in his three-wheeled people carrier. But Samir's daily routine of beeping, swerving and cursing Cairo's congestion could all come to a crashing halt under an ambitious government plan to turn Cairo's streets more green. Ahead of hosting a COP27 climate conference this year, the government has announced its intention to begin eliminating all fuel-powered tuk-tuks in the years ahead and make other forms of public transport more environmentally friendly. Drivers fear that saving the planet will come at their cost. "I…