Quiet revolution

 [After setting your car on fire] Listen, your car's temperature has changed before.

Human activity affects weather, climate, and the environment. Some human activity is harmless, but much human activity degrades the environment. While the environment can absorb some abuse without long-term effects, much harmful human activity exceeds the environment's ability to recover. The most significant way that humans damage the environment is by emitting harmful chemicals into the air and water. This activity has wide-ranging results, such as increasing the temperature of the planet, lowering the quality of the air we breathe, and killing forests and aquatic animals.

The theory behind global warming has been understood by climatologists since at least the 1980s, but only in the new millennium, with an apparent tipping point in 2005, has the mounting empirical evidence convinced people and growing sections of business that human actions do influence climate and that it is warming the planet. Other influences also exist and how much each contributes remains a debate. Not getting into that debate, does not mean we ignore the (unintended) effects our actions (and inactions) are having.

Environmental effects of our actions include air pollution and smog, acid rain, and ozone depletion. Each of these have multiple effects and there is mounting evidence that they result in increased impact on the environment over the last few years. The search for solutions to these environmental problems has brought some results, including research on alternative energy sources.

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2019/02/21 12:32 · Beauty

We tend to think of climate - as opposed to weather - as something unchanging, yet humanity has been at the mercy of climate change for its entire existence, with at least eight glacial episodes in the past 730,000 years. Our ancestors adapted to the universal but irregular global warming since the end of the last great Ice Age, around 10,000 years ago, with dazzling opportunism.

Scientists warn the sun will 'go to sleep' in 2030 and could cause temperatures to plummet. Is it a major factor, or will it just slow down the warming trend?

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Direct combination of interpreted geological temperature records is not necessarily valid, nor is their combination with other more recent temperature records, which may use different definitions. Nevertheless, an overall perspective is useful even when imprecise. In this view time is plotted backwards from the present. It is scaled linear in five separate segments, expanding by about an order of magnitude at each vertical break. Temperatures in the left-hand panel are very approximate, and best viewed as a qualitative indication only.

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2019/02/17 11:15 · Beauty

Potential natural vegetation (PNV) is a concept used to investigate and evaluate the theoretical potential of the natural environment of an area that may have had its environmental and geographical conditions modified by human activities over time. More exactly, it is the vegetation that would be expected given environmental constraints (climate, geomorphology, geology) without human intervention or a hazard event and is useful for the regeneration of natural vegetation. Native species are considered having optimum ecological resilience for their native environment, and the best potential to enhance biodiversity. To determine “natural” vegetation, scientists research the original vegetation of a land through retrospective ecology. Past ecosystems allowed to demonstrate, for instance, that numerous contemporary biotopes, supposedly largely untouched, were in fact very remote from their natural vegetation.

What about climate change?

It was first proposed by German vegetation ecologist Reinhold Tüxen in 1956 as a new idea to understand nature.

The idea of creating a forest by closely planting together different types of trees of the potential natural vegetation of the land, based on PNV, is called the Miyawaki Method. Closely and randomly planting many types of seedlings results in creating forests of tall and medium high trees as found in natural forest systems, which will reinforce diversity and resistance and will lead to co-existence of plants and draw from the vital energy of the trees themselves. Human support for tree growth are required only for the first three years after planting. After that, forest management is left to nature.

Save for that the climate seems to be changing rather rapidly.

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2019/02/17 08:24 · Beauty