Reshaping the plastic lifecycle into a circle

In 1950, 2 million metric tons of new plastic was produced globally. In 2018, the world produced 360 million metric tons of plastics. Because of their low cost, durability and versatility, plastics are everywhere—including ...

We were at COP26. It had mixed results

The recent COP26 was eagerly awaited. Originally planned for 2020, the event was postponed due to the COVID-19 pandemic. It was also meant to be a major step toward implementing the Paris Agreement.

Poor diets imperilling people and the planet: report

Nearly half the world's population suffer from poor nutrition linked to too much or not enough food, a global assessment said Tuesday with wide-ranging impacts on health and the planet.

Healthier UK diets linked to lower greenhouse gas emissions

A new analysis adds to evidence that nutritious diets are often more environmentally sustainable, while also demonstrating the feasibility of evaluating diet sustainability at the scale of specific foods—rather than broader ...

Five ways to cut down on food waste, and why it matters

When people think about ways to help the environment, encourage biodiversity and decrease greenhouse gases, they don't usually think about the impact of food waste. And yet food waste is responsible for up to 10% of global ...

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Greenhouse gas

Greenhouse gases are gases in an atmosphere that absorb and emit radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. Common greenhouse gases in the Earth's atmosphere include water vapor, carbon dioxide, methane, nitrous oxide, and ozone. In our solar system, the atmospheres of Venus, Mars and Titan also contain gases that cause greenhouse effects. Greenhouse gases greatly affect the temperature of the Earth; without them, Earth's surface would be on average about 33°C (59°F) colder than at present.

Human activities since the start of the industrial era around 1750 have increased the levels of greenhouse gases in the atmosphere. The 2007 assessment report compiled by the IPCC observed that "changes in atmospheric concentrations of greenhouse gases and aerosols, land cover and solar radiation alter the energy balance of the climate system", and concluded that "increases in anthropogenic greenhouse gas concentrations is very likely to have caused most of the increases in global average temperatures since the mid-20th century".

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