But cheap oil also discourages investment in fossil fuel extraction.

But often they are surrounded by states that lack the mandates, which discourages investment, Granholm said.

Cheap oil encourages waste; worse, it discourages investment in a more efficient "energy infrastructure".

Not only is fire the greatest destroyer of existing forests, but it also discourages investment in reforestation.

R. FAIRCHILD, Professor of Economics, Yale University, member International Tax Conference: Probably nothing more effectually discourages investment than uncertainty as to future costs.

They say the uncertainty over taxes discourages investment and hurts job growth as the economy recovers from the worst recession since the Great Depression.

Canadian National and Canadian Pacific oppose the revenue cap, saying it discourages investment, while farmers and grain companies say it's necessary given limited rail competition.