Showing posts with label climate. Show all posts
Showing posts with label climate. Show all posts

Saturday, December 23, 2017

Plug-in Hybrid

A plug-in hybrid electric vehicle, short PHEV, is a car which uses an electric motor lie a purely electric car plus some other motor, usually a combustion engine. It can recharge, like a pure electric car, from grid power. But also by the other engine or even convert some of the energy won by decelerating.

As noted in the article about electric cars you might will a worse turnover when living in an area where the electricity is created by the use of fossil fuels. But since plug-in hybrids also uses the combustion engine to recharge, you are still "greener" than with a car running on pure electric, if the efficiency of the electric car is worse than a car running on gas, and the electricity for recharging the electric car is mainly made from fossil fuels. Might help to not let the climate change become as worse as predicted without cutting carbon emissions.

Monday, December 18, 2017

Electric cars and climate change

Many hail electric cars to be "green". Slow down climate change by induced global warming. Save the planet by reducing carbon emissions and its footprint, and thus the greenhouse effect. But this would be too easy. It's an equation, and all depends on the variables to fill in.

To be "green" the electricity has to be from renewable sources, such as solar, wind. Also hydro-electric should count, as its turbines spin when ever water flows. May be even nuclear, as it does not produce carbon emissions. But it has other disadvantages. How to do dispose spent fuel? Or disasters like in Chernobyl and Fukushima.

So it mainly depends on where you charge your electric car. What are the means used there to produce electricity. If using fossil fuels by a coal fired plant, oil, natural gas or petroleum, or bio fuels like heavily used in Brazil, this isn't really "green". It might be "greener" though if the electric car has a higher mileage than a car with combustion engines using the same energy (efficiency).

Also take take into account is the manufacturing. As of 2017 the manufacturing of an electric car emits more carbon emissions than of a conventional car.

I say we are on the right way. But as mentioned it highly depends how the electricity is created where an owner of an electric car plugs it into the grid. If it is from (mainly) hydro, wind or other renewable, also nuclear, energies where you plug it into the grid, you do something positive at the end. If your grid's electricity derives from fossil fuels you probably not. Taking here in account the costs of an electric car you might be better of with a conventional with a low fuel consumption. At least until your grid feeds from renewables.

Technologies have to improve too, and they will. Emitting less carbon on the manufacturing. Building better batteries giving electric cars a longer range. And of course the sources of which the electricity is produced has to more and more come from renewable forms.

Sunday, December 17, 2017

California fires caused by global warming?

Is climate change responsible for the massive wildfires in California? Some point the finger at it. And although I am a believer that global warming is caused by humans and the burn of fossile fuels I don't think there is enough conclusive evedence to support this.

Wikipedia states more than 250 fires were burning 245,000 acres (990 km), and causing more than $9.4 billion US dollars in damage in October rhis year alone. 10 of the worst wildfires occurred in the past 14 years since recording. And California is not alone. It has also been a particular bad year for British Columbia.

Contra global warming is La NiƱa, which is currently weak, causing cooling. Then strong Santa Ana winds (not caused by global warming) helping the fire. Then there is a pretty cold East Coast, bulging the Jet Stream, contributing to conditions for wildfires. This appears also to not caused by climate change.

Pros are the drought over the western USA, which is believed by many to be caused by global warming. And the delay of the onset of the usual rain in fall, worsening the drought.

I suppose only time will tell if global warming is the culprit. To see how this develops in the future. And if fires get worse, if pros or cons for global warming indicate if climate change is to blame, or non related patterns emerge supporting the one or other.

Wednesday, November 8, 2017

Syria plans to join the 2015 Paris agreement

Apparently Syria plans to join the 2015 Paris agreement along with Nicaragua. Makes the US the only country not joining. There are tow things making me wondering. Is Syria now doing anything to oppose what ever the US is doing? Why would they (and Nicaragua) suddenly care? May be it just feels bad to be among the few countries not signing, bad to be outcast? And why didn't they sign earlier? Both are not among the major polluters, why did hesitated? The other thing is what would have happened for the decision of the US if not Trump, but Obama, even Bush, were in charge? May be they'd joined? If, that would be just another indication that the Trump administration seeks to be isolated from the rest of the world. Possibly trying to get back to a state from the 30s before the US joined World War II, where the US didn't really cared what was going on in the rest of the world, minding their own business.

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