(8) Many experts today believe that bio-fuel production causes more problems than it solves. Describe the main reasoning behind this view. · Bio-fuel production causes loss of tropical forest and other natural habitats, depletes oil, accelerates climate change, and exacerbates world hunger.

· To grow biofuel crops, there needs to be cutting and burning of forests
· You need burning of oil based fuel and use of petroleum based fertilizers to grow biofuel crops which leads to less oil which leads to a new for more biofuel so you burn all the forests and you need the oil to regrow them again

· Deforestation – especially in South America and Indonesia accounts for 20% of all carbon emissions

· Farming biofuels produces nitrous oxide which is bad for climate change

· Large scale burning and cutting to grow crops –including biofuel crops- also causes adjacent forest decline: it causes reduced transpiration and hence reduced rainfall in adjacent forest areas result in drought cycle which accelerated death of trees which further reduces transpiration and rainfall. The accelerated death of trees results in warming of forest floor and accelerated decomposition of soil organic matter and explosion of termite population son dead tree trunks and branches. Both of this releases huge quantities of methane and carbon dioxide

· The use of biodiesel from algae is not as green as it seems. It can generate four times the greenhouse emissions from regular diesel. When algae is farmed in Perspex tubes, the energy needed to pump the algae around to ensure adequate exposure to sunlight results in a carbon footprint of 320 g/MJ equivalent to fuel – this compares with 86 g/MJ to extract, refine, and burn regular diesel