Skip to main content

Deepwater Horizon oil spill puts dolphins at risk (downtoearth)

The Deepwater Horizon oil spill has spelt doom for dolphins in Barataria Bay in the Gulf of Mexico. A study conducted by the UK-based University of St Andrews says dolphins are struggling to survive in the gulf.

The spill, which occurred in 2010 in the Mexican gulf, killed thousands of marine mammals and its negative effects are still being felt seven years after the incident. In what can be termed as one of the worst environmental disasters, an explosion in the Deepwater Horizon rig spilled 134 million gallons of oil into the sea.

The study coordinated by the National Oceanic and Atmospheric Administration found that the dolphin population in Barataria Bay will have reduced by 50 per cent within the decade following the spill and that full population recovery will take 40 years. In addition, scientists found that 25 per cent of the current population of dolphins is underweight and 17 per cent are in poor condition.

The chemicals present in oil and petroleum products can affect marine animals either by internal exposure due to inhalation and ingestion, or external exposure through the skin and eyes.

Sea turtles were found dead after being exposed to chemicals following the lxtoic oil spill. On investigation, researchers found that the dead turtles were exposed to massive amounts of hydrocarbons. Presence of oil on the beach also affects turtles’ nesting habit. In the aftermath of the Chennai oil spill, Olive Ridley turtles have been badly affected.


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