Since the industrial revolution began in the mid-1700s, atmospheric carbon dioxide concentrations have gone up by 46%.
For the past two and a half million years, Earth has experienced regular ice ages, but with carbon dioxide levels now over 400 parts per million, the next ice age is postponed for a very long time.
While hemp does not sequester as much carbon dioxide as trees, it can be used as an efficient energy crop or in concrete, both with a potentially positive carbon sequestration effect.
Planting any tree is more important than planting a particular tree when it comes to removing carbon dioxide from the atmosphere.
The Orbiting Carbon Observatory satellite makes precise measurements of Earth’s carbon dioxide levels from space.
Carbon dioxide makes up less than one-twentieth of 1% of Earth's atmosphere. How does this relatively scarce gas control Earth's thermostat?
Returning nutrients, including animal feces, to the land is important to maintain the soil’s capacity to sequester carbon.
Regenerative agriculture has the potential to build production and reducing pollution, but it needs a clearer definition.
While growing grass takes up carbon dioxide, it emits it again back into the atmosphere when it is mowed or eaten.
All plants take up carbon dioxide when they grow, but when they are harvested or cut down, they release the greenhouse gas back into the atmosphere.
Putting a price on greenhouse gas emissions forces us to face at least some of the environmental cost of what we produce and consume.
Traditional market transactions ignore the costs of greenhouse gas emissions. An emissions trading scheme is a tool to put a price on emissions and to influence us to choose lower-emission options.
Research shows the cost of damage through climate change will be much greater than the costs of reducing emissions.
New Zealand is small and generates a tiny fraction of global greenhouse gas emissions, but investment in cutting emissions is important and could influence other, larger countries.
Fast-growing plantation trees store less carbon per surface area than old, undisturbed forests that may show little growth.
Plants live off carbon dioxide, but a higher level of the greenhouse gas in the air doesn't necessarily lead to more biomass production.
Climate change, together with other ecological pressures, may well undo the gains we have made in health.
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