The composition of the atmosphere hundreds of years ago can be established through the ice cores by studying: 

In the case "Organic Food air freighted into UK," the Soil Association considered banning air-freighted organic produce because organic agriculture produces high GHG emissions.

Plastics can be based on or made from biomass or plant materials and from fossil fuel or petrochemicals.

Energy from nuclear fission is clean, recyclable, and sustainable; therefore, nuclear power can be considered as a renewable energy source.

In applying the "mitigation

hierarchy" to biodiversity loss, which step or approach should we take

first as much as possible:

Oceans serve as a major natural carbon sink:

In terms of the Plastic Management Index, Japan ranked much lower in this category:

This principle recognizes that developed countries which

contributed more to climate change should have greater share of responsibility

than developing countries:

Some critics claim that "Sustainable Development" (SD) is an "oxymoron" because:

Some sectors suggest that it may be

better to allocate resources on species and ecosystems that would significantly

benefit from preventive measures, rather than on those that are beyond repair. This

example is an application of which concept or principle: