The White House on Thursday said it is targeting 20  percent lower aviation emissions by 2030, as airlines facing pressure from environmental groups to lower their carbon footprint pledged to use more sustainable aviation fuel (SAF). The push to accelerate carbon cutting is part of President Joe Biden’s target of making the United States net carbon neutral by 2050. It comes as the United States and Europe are trying to boost production of SAF, which is now made in miniscule quantities from feedstocks such as used cooking oil, and can be two to five times more expensive than standard jet fuel. Biden said he is seeking a SAF tax credit as part of the $3.5 trillion reconciliation bill being pushed by congressional Democrats, a move the industry says is necessary to offset the higher costs of production. Announcements from the White House and U.S. carriers confirmed Reuters reports that Biden …