Because it smells bad
Yes, planes can use biofuels as a more sustainable alternative to traditional fossil fuels. Biofuels, derived from renewable sources such as plants and waste materials, can help reduce greenhouse gas emissions and dependency on fossil fuels in aviation. Several airlines and aircraft manufacturers have successfully tested and implemented biofuels in commercial flights, contributing to the industry's efforts to achieve greater environmental sustainability. However, the widespread use of biofuels in aviation is still in the early stages and faces challenges related to production and scalability.
Ummm . . . windmills use the wind to keep them turning. No biofuels are involved.
Use as gas
source:(http://en.wikipedia.org/wiki/Biofuel)we use biofuels because they do not make as much pollution as normal fuels.
Biofuels
If they are diesel powered they can.
Challenges to widespread use of wind energy include intermittency of wind supply, land-use requirements for wind farms, potential negative impacts on wildlife, and high initial investment costs. Additionally, issues related to transmission and grid integration can also restrict widespread adoption of wind energy.
Biofuels face several challenges, including competition with food production, which can drive up prices and lead to food insecurity. Their production often requires significant land, water, and energy resources, potentially resulting in deforestation and biodiversity loss. Additionally, the greenhouse gas emissions associated with land-use changes and certain farming practices can undermine their environmental benefits. Lastly, the technological and economic viability of advanced biofuels remains uncertain, hindering widespread adoption.
Perhaps greed. Because leds cost less and last longer. Or mabye there not bright enough or to bright.
In order to grow the crops required to produce biofuels more forests need to be knocked down to make the necessary fields.
There is widespread use of the internet.