Kenya warms to the water hyacinth as wonder source of biofuel | Gilbert Nakweya

This invasive plant was reviled for clogging rivers but now it's helping provide cleaner energy and protect health

It is 9am on the shores of Lake Victoria's Winam Gulf in Kenya's Kisumu county. Tourists are arriving on the beach in droves, preparing to spend the day sunbathing and taking boat rides. Behind them, enormous marabou storks on spindly grey legs are pacing the beach, waiting for scraps.

Nearby, a group of women scan the horizon, looking for the fishing boats that will soon arrive with their daily catch.