Search

...carbon atoms and blue ones for nitrogen atoms. Models can be very helpful in showing how atoms fit together to make molecules. [Figure 8] Figure 8 Models of a water molecule: (a) a chemist's representation of water; (b) a ball-and-stick model; (c) a space-filling model. Note: although the hydrogen and oxygen atoms are shown as the same size in (a), in fact they are...

...carbon dioxide (CO₂) in the atmosphere, which is making the oceans warmer and more acidic, are also a significant threat to marine life. There is potential to increase ocean food production but, under these conditions, eating more of the species at the top of the food chain, such as tuna and salmon, is just not sustainable. As a recent EU report highlighted, we should...

...carbon, they can’t make it zero carbon, but they can certainly lower the carbon, they can have the debates about what they should be doing, they can adjust their portfolio. They should be seen to be participating, not being dragged to the table. RH: You have a huge divergence as well between companies here in Europe and companies in the USA in terms of attitude, how on...

...carbon in a fast-changing climate. At the COP 21 negotiations in 2015 the 4 Per 1000 Initiative was launched. The initiative is a voluntary undertaking, which seeks to spur on actions that target a 0,4% rise of soil carbon content annually and throughout the world. The aim is to sequester carbon to meet the Paris Accord’s goal of limiting temperature rise to a...

...carbon dioxide in, oxygen out – during photosynthesis. In high light levels, on sunny days, a lot of carbon dioxide is fixed to make sugars by photosynthesis. Loss of water is also important to cool plants on hot days. If plants run short of water they shut down their stomata and photosynthesis stops and is replaced by photorespiration – a process that releases carbon...