Oil and gas major BP Plc (<a href="https://www.londonstockexchange.com/stock/BP./bp-plc/company-page" target="_blank">LON:BP</a>) is stepping up its push into the bioenergy market with a bet on a unit of China-based Zhejiang Jiaao Environmental Protection Technology (SHA:603822) that is building a sustainable aviation fuel (SAF) plant capable of producing 500,000 tonnes of biofuel annually.