If you are talking of the seeds of Jatropha am yet to think of any environmental issues, but in terms of the food security issues, the seeds are edible when cooked and are taken as snacks in part of the world . The yield of the biodiesel must be taken into consideration vis - a- vis the availability of the seeds

Growing jatropha requires vast lands and this destroys the environment and ecosystems.........it has negative impacts on the environment

M.M. Manyuchi, thanks for your reply,

as for as land is concerned, if we grow it on marginal lands, like desert, it cannot be issue. What are its negative impacts on environment? if we grow a new plants on an area which is free from vegetation.

dear Achugasim Ozioma, If you have concerned about propagation of Jatropha through seeds, i may add that it can propagated vegetatively, using its branches

Hi there, Jatropha can be used to process very high quality biodiesel and there are not food security issues with it since it is not palatable plus it can grow on marginal land with very less or no cultivation care. For a country like Pakistan and Nepal, where we have an abundance of marginal land it is very viable alternative green energy option. I don't know in detail about Pakistan, but in case of Nepal we have an abundance of land and I feel that we have underutilized our resources. As much as I have seen Pakistan on TV I think it holds equally true for Pakistan too and even India as well. What I believe is that we can have a very successful switch to biomass based energy resources if we utilize our land more scientifically.

http://ieeexplore.ieee.org/document/6828968/

https://umexpert.um.edu.my/file/publication/00005361_89817.pdf

https://www.omicsonline.org/open-access/economic-sustainability-of-jatropha-cultivation-for-biodiesel-production-lessons-from-southern-africa-2090-4541-1000244.pdf

https://ec.europa.eu/europeaid/sites/devco/files/study-impact-assesment-biofuels-production-on-development-pcd-201302_en_2.pdf

https://stud.epsilon.slu.se/5241/1/Naureen_A_130129.pdf

Good

Producing more bio-fuel crops will also affect water quality for converting pastures or woodlands into maize fields may increase problems of soil erosion and runoff of excess nitrogen and phosphorous into surface and groundwater’s. Pesticides and other chemicals can also wash into water bodies. Biodiesel production typically requires a more expensive buy-in due to a number of factors, starting with the extreme differences in feedstock sources soybean oil, corn oil, forest residue and more. Using biodiesel lowers particulate matter by 47%, reduces hydrocarbon emissions by up to 67%, and reduces smog. Its environmental benefits don't stop there. The production of biodiesel, in lieu of petroleum diesel, reduces wastewater by 79% and hazardous waste by 96%. When burned, pure bio-fuels generally produce fewer emissions of particulates, sulfur dioxide, and air toxics than their fossil-fuel derived counterparts. Bio-fuel-petroleum blends also generally result in lower emissions relative to fuels that do not contain bio-fuels. Thus, biodiesel production from jatropha grown on marginal, previously unused land without any fertilizer may still have adverse impacts on food security if it competes for scarce water resources that are currently used by agriculture. Bio-fuels can be an effective means to increase food security by providing poor farmers with a sustainable and affordable energy source. Biodiesel production does not result in a lot of waste. However, depending on the process and feedstock’s use, it can produce some wastewater, minerals, resins, solids strained out of used oil and glycerin. A conservation-oriented production method and good crop selection are crucial for producing better bio-fuels. Because photosynthesis consumes CO2 and because perennial crops can accumulate soil carbon, bio-fuel production and utilization can be carbon neutral and even reduce net atmospheric CO2. Thus, low-carbon energy scenarios developed by diverse organizations foresee widespread use of biomass for energy