Emissions of vanadium to the atmosphere parallel the increased use of heavy oil and are now nearly twice the sum of all natural sources combined.
Ammonia is unregulated, yet it is the cause of poor health and early death in rural agricultural communities.
Geoengineering climate garners support among those who have abandoned all hope that we will ever cut our emissions of “greenhouse” gases from fossil fuel combustion.
We need to ensure that inadvertent releases of unhealthy substances from oil sand operations are not overlooked and are properly regulated.
Science and art leave a record of environmental condition, as it affects the human perception of environmental conditions.
Airplane contrails have little impact on climate, but, contrails are an interesting surrogate for what clouds may do in the future.