Recent Posts by Garrett Nagle

Mass extinction of insects

Up to 50% of all insects may have been lost since 1970 as a result of habitat removal, the increased use of pesticides, invasive species, climate change and light pollution. As many as 40% of the known insect species may be at risk of extinction. In the UK alone, the use of pesticides has doubled since 1995, and 23 species of wasps and bees became extinct between 1900 and 2000. The value of bees as pollinators in the UK is ...

The Indian dipole

Global warming has been called by a number of different terms in recent years: global heating, climate crisis and Hothouse Earth, for example. These terms suggest that ‘warming’ might be too ’soft’ a term and may ignore the fact that in many places, there is a significant rise in temperature, hence ‘heating’. One example is the rise in temperatures in the Indian Ocean which may be linked to the bush-fires in Australia and flooding in parts of Africa. The Indian Ocean ...

Trafficking in Britain

It is not known how many illegal migrants there are in Britain. Some estimates put them at around 650,000 +/- 200,000! What is clear, however is that people will take huge risks to enter the UK in search of work. What is also clear is that security has been tightened at the main ports and that smugglers have switched to other ports. For example, at Dover lorries may be searched with the use of x-rays, dogs, carbon dioxide sniffers and ...

Glacial streams as a carbon sink

Scientists have only recently discovered that Arctic/glacial meltwater streams take in atmospheric carbon at a faster rate than tropical rainforests. Previously scientists have assumed that rivers were a source of carbon rather than a sink. The results were based on tests carried out on Ellesmere Island in Nunavut territory, Canada, the Rocky Mountains and in Greenland. Scientists studied the effects of glacial meltwater running into rivers and lakes downstream. In temperate rivers high levels of organic matter in rivers leads to ...

More flooding is inevitable, says IPCC

According to the Intergovernmental Panel on Climate Change (IPCC) extreme events that used to have a return period of once every century could be happening on some coastlines very year by 2050.They reported that serious impacts in the world’s oceans and ice caps are inevitable. However, they also point out that impacts could be even worse without a reduction in fossil fuel emissions, including sea level rises of over 4 metres by 2300. The oceans are under great threat from sea ...

High yielding seeds in East Africa

In eastern Uganda, population growth has forced farmers to farm smaller plots of land. Whereas in the past many farmers had access to manure from their animals, increasingly they are having to rely on chemical fertilisers. Moreover, farmers used to keep part of one year’s crop to plants for the following year’s produce. This has become less common and farmers are more likely to buy high yielding varieties (HYVs) of seed to produce their crop. HYVs, along with irrigation water ...

Urban farming

Urban farming (also known as vertical farming) is an intensive form of agriculture which produces high quality crops year round. Crops are grown in an artificial environment in which temperature and humidity are carefully controlled. Up to 95% of water is recycled and nutrients are carefully provided. LED lighting provides the wavelengths that plants require so energy is saved. Insects are not present so pesticides are not required. Nevertheless, electricity bills are high and the threat of power cuts is a ...

Deforestation in Brazil

Brazil accounts for around 40% of the world’s rain forests and around 10-15% of the world’s biodiversity. Over the last fifty years, it has lost about 20% of the original 4 million km2 of rainforest due to farming, logging, dam construction, mining and other infrastructural developments. At the same time, average temperatures have increased by 0.6ºC, and the area has experienced a number of severe droughts. Between 2004 and 2012, the rate of deforestation slowed down, but by 2017 it had ...

Heatwaves

By Monday, August 26, 2019 No tags 0

Many parts of the Northern Hemisphere have experienced heatwaves over the last month. Gallargues-le-Mountueux recorded France’s highest ever temperature of 45.9°C, beating the existing record by 1.8°C. Cambridge recorded the highest temperature ever in the UK. In June, the summit Mount Blanc recorded a temperature of 7°C, whereas normally it would have been below 0°C. Records were broken across Switzerland, Germany, Austria and Spain. The impacts of heatwaves are often underestimated. Images of hurricanes and floods may have a greater impact, ...

Migration in Myanmar

By Friday, August 23, 2019 No tags 0

Myanmar has experienced a surge in migration over the last decade. Many were forced to abandon their homes following Cyclone Nargis is 2008. However, the lifting of restrictions on internal migration, and the attraction of foreign investment has led to a rapid increase in the number of migrants to urban areas, and an increase in the economy of around 6% annually. The garment sector is one of Myanmar’s strongest parts of the economy, with exports of clothes and shows increasing ...

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