Nearly all pesticides are made from oil: http://en.wikipedia.org/wiki/Petroleum
Many synthetic fertilizers are synthesized directly from natural gas: http://en.wikipedia.org/wiki/Fertilizer
Many synthetic fertilizers are synthesized directly from natural gas: http://en.wikipedia.org/wiki/Fertilizer
Synthetic fertilizers are not synthesized from natural gas - they can't be. Methane has no elements that plants need. Methane is just a carrier for the elements acquired elsewhere.