Requires massive amounts of land to produce

Not efficient

Not exactly clean

Deforestation as demand increases means loss of wildlife habitats

Not cost effective

Accelerated erosion, deforestation, water pollution, and increased water scarcity with land use change

Increases in demand for biofuel increases crop prices, causing food security issues in poorer regions

Some studies suggest it takes more energy to produce biofuels than the energy biofuels provide