Skip to main content

Climate change will cost cities twice as much as rest of the world (downtoearth)

A study by an international team of researchers has found that cities bear at least twice the cost of climate change compared the rest of the world due to the “urban heat island effect”. This is the first time that the potential of combined impact of global and local climate change on urban economies has been quantified.

The study, published in the journal Nature Climate Change, analyses 1,692 cities around the world and shows that the collective economic burden of climate change for cities over this century could be 2.6 times higher, when the effects of concentrated pools of heat or “heat islands” that form in heavily built-up areas are taken into account. While the global average of the losses could amount to about 5.6 per cent of the GDP by the end of the century, for the worst-affected cities, this figure is likely to be much higher, even up to 10.9 per cent of the GDP.

Heat islands form when natural vegetation is replaced by heat-capturing surfaces such as concrete, asphalt and glass. Warming in cities is worse than the countryside due to vehicular pollution, air conditioners and industrial emissions. The heat island effect has been estimated to add up to 2 degrees Celsius for the most populous cities by mid-century.

The authors—from the University of Sussex in the UK, Universidad Nacional Autónoma de México and Vrije University Amsterdam—have used their research to suggest that local efforts to cut down warming are just as important as macro-scale global efforts. Researchers have used a cost-benefit analysis to compare different local strategies for their heat-combating potential. According to the team, the cheapest measure is a moderate-scale installation of cool pavements and roofs which capture less and reflect more solar radiation. Converting 20 per cent of the urban surfaces to “cool” variants could save up to 12 times the cost of maintenance and installation, says the study.


Popular posts from this blog

Cloud seeding

Demonstrating the function of the flare rack that carries silver iodide for cloud-seeding through an aircraft. 
Water is essential for life on the earth. Precipitation from the skies is the only source for it. India and the rest of Asia are dependent on the monsoons for rains. While the South West Monsoon is the main source for India as a whole, Tamil Nadu and coastal areas of South Andhra Pradesh get the benefit of the North East Monsoon, which is just a less dependable beat on the reversal of the South West Monsoon winds.

SC asks Centre to strike a balance on Rohingya issue (.hindu)

Supreme Court orally indicates that the government should not deport Rohingya “now” as the Centre prevails over it to not record any such views in its formal order, citing “international ramifications”.

The Supreme Court on Friday came close to ordering the government not to deport the Rohingya.

It finally settled on merely observing that a balance should be struck between humanitarian concern for the community and the country's national security and economic interests.

The court was hearing a bunch of petitions, one filed by persons within the Rohingya community, against a proposed move to deport over 40,000 Rohingya refugees. A three-judge Bench, led by Chief Justice of India Dipak Misra, began by orally indicating that the government should not deport Rohingya “now”, but the government prevailed on the court to not pass any formal order, citing “international ramifications”. With this, the status quo continues even though the court gave the community liberty to approach it in …

Indian Polity Elections (MCQ )

1. Who of the following has the responsibility of the registration of voters
a) Individual voters
b) Government
c) Election commission
d) Corporations

2. Democracy exists in India, without peoples participation and co operation democracy will fail. This implies that
a) Government should compel people to participate and cooperate with it
b) People from the government
c) People should participate and cooperate with the government
d) India should opt for the presidential system

3. Which of the following are not the functions of the election commission
1) Conduct of election for the post of the speaker and the deputy speaker, Lok sabha and the deputy chairman, Rajya sabha
2) Conduct of elections to the state legislative assemblies
3) Deciding on all doubts and disputes arising out of elections

a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 2

4. Which of the following electoral systems have not been adopted for various elections in India
1) System of direct elections on the basis of adult suffrage