Rainforests are the oldest living ecosystems and without a shadow of a doubt, the most vital habitats on Earth. They cover only 6% of the Earth’s surface but yet they contain more than half of the world’s plant and animal species. According to the current estimates, around 40% to 75% of all biotic species are indigenous (see notes 1) to the rainforests.
What’s more, there are probably millions of species of plants, insects, and microorganisms still undiscovered in tropical rainforests.
Last winter, unforgettable video footage online showed a starving polar bear, struggling in its Arctic hunting grounds. Because of global warming, the ice was thin and the food supply was scarce. The video generated a wellspring of sympathy for the plight of this poor
Such advocacy on behalf of wildlife usually focuses on species and the effects of human-caused climate change on their survival and wellbeing as the ecosystems on which they depend undergo drastic changes. Thus, we should act to save the polar bear – that is, the polar bear species – by doing what we can to preserve its natural ecosystem. I am fully behind this kind of advocacy. Anybody who cares about the future of our planet and its occupants should be.
Light pollution is often
In a recent Nature Sustainability paper, a team of scientists concluded that the Earth can sustain, at most, only 7 billion people at subsistence levels of consumption (and this June saw us at 7.6 billion). Achieving ‘high life satisfaction’ for everyone, however, would transgress the Earth’s biophysical boundaries, leading to ecological collapse.
Despite today people are living longer, healthier, and happier lives than ever before, there are still many problems that humanity should address. One of the most important of them is water inequality. While people in First World countries can very easily take fresh, clean water for granted, more than 800 million others in impoverished areas have no access to any clean water source. It is a common occurrence in some regions for people to defecate openly, walk more than 30 minutes to access clean water, and share toilets with other humans. In 2018, is this really something that we should just accept as an inevitable way of the world?
As a result of global warming, the seas warm and ice melts. Naturally, Earth’s oceans have risen steadily – or at least, it was thought so. According to a new study based on 25 years of NASA and European satellite data, rather than increasing steadily, global sea-level rise has been accelerating in recent decades. If this trend continues, by the year 2100, sea-level rise will be around 65 cm (25.6 in), twice as big as previously thought. This is more than enough to cause significant problems for coastal cities.
Satellite altimetry (see notes 1) has shown that since 1993, the global mean sea level has been rising at a rate of ∼3 ± 0.4 millimeters per year. Researchers show that this rate is accelerating at 0.084 ± 0.025 mm/y2, which agrees well with climate model projections. This acceleration is driven mainly by increased melting in Greenland and Antarctica because of global warming. If the sea level continues to change at this rate and acceleration, sea-level rise by 2100 (∼65 cm ± 12 cm, compared with 2005) will be more than double the amount if the rate was constant at 3 mm/y, researchers conclude.
Our civilization
Limiting global warming to below 2°C above compared to preindustrial times requires not only massive near-term greenhouse gas emissions reductions but also the application of “negative emission” techniques that extract already emitted carbon dioxide from the atmosphere called
In the quest for expanding the boundaries of human exploration and ensuring the long-term survival of our species, the idea of colonizing Mars and other celestial bodies has emerged as a captivating and viable possibility. While Earth remains our home, the potential colonization of Mars, along with other planets and moons within our solar system, presents a host of compelling reasons. From scientific discovery and resource utilization to the preservation of our species, the case for venturing beyond our blue planet grows increasingly enticing.
Our planet is experiencing a new geological era, according to a growing number of scientists. The Anthropocene, as it is being called, marks the first time in Earth’s history that human activities have had a significant and lasting impact on the planet’s ecosystems, geology, and climate. The term “Anthropocene” is derived from the Greek words “anthropos,” meaning human, and “kainos,” meaning new, to reflect the idea that humans are the driving force behind this new epoch. While the idea of the Anthropocene is still a subject of debate among some scientists, the concept has gained widespread acceptance and is viewed as a call to action to address the environmental challenges that our planet faces today.
“Your life on Earth” is a nice interactive webpage presented by the BBC – The British Broadcasting Corporation: how you and the world have changed since you were born? You’re simply entering your birth date, gender