Green reads – khazans, urban observatory, deepest hole in the world and solar dimming



Agricultural engineering – khazans

Goa is known for its khazans, agricultural lands protected from the force of nearby rivers with the help of bunds and sluice gates. If we are unable to take care of these, may be we will lose this knowledge forever. Can’t imagine that happening.

Willful and other illegal inundation, poor management, uncontrolled and unplanned urbanization, pollution and Siltation, Konkan Railway intrusion and lack of political will are major factors responsible for degradation of Khazan lands. – ENVIS

Modern cartography – The Urban Observatory

The Urban Observatory is an interactive app that let’s you see the data as amazing graphics, where you can see data from multiple cities at one go. But you want to see just one, you have it. I search for Mumbai first, but they don’t have it yet. So, I see Abu Dhabi because I like the name. And I see this:


But why not Mumbai? That’s because Mumbai hasn’t tried yet. It needs to send the data. Here’s how it can do it.

The people in Dubai don’t like the Flintstones – but the people of Abu Dhabi do! Get it?

So, where’s the deepest man-made hole on our planet?

Nope. It’s not the one in Siberia, because that’s probably not man-made. I’m talking about the Kola Superdeep Borehole in Russia. The interesting part is not that it is deepest hole on our planet. It’s the fact that researchers found that the composition of the Earth’s crust is not what was theorized. They found granite instead of basalt rock. They also found water, unexpectedly again. That’s because scientists thought it wasn’t possible for water to exist at such depths, under such temperature and pressure conditions. I’m not even talking about the ‘hidden ocean‘ here. ;)

River people must hate solar dimming

Solar dimming, or better known as global dimming, is the decrease in the amount of solar radiation reaching the Earth. Over five decades, it has nothing but decreased. In my post at GreenHatters on environmental impacts of electricity generation, I talked about how black carbon released from power stations absorbs sunlight instead of reflecting it back, contributing to increase in atmospheric temperature.  Such visible air pollution is the reason behind solar dimming. This is not it though because such events are finely chained in nature. A recent study has found that air pollution increases river-flows. What will then happen of Uttarakhand?


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