Frontiers | Underestimating the Challenges of Avoiding a Ghastly Future | Conservation Science
https://www.frontiersin.org/articles/10.3389/fcosc.2020.615419/full

We report three major and confronting environmental issues that have received little attention and require urgent action.

First, we review the evidence that future environmental conditions will be far more dangerous than currently believed. The scale of the threats to the biosphere and all its lifeforms—including humanity—is in fact so great that it is difficult to grasp for even well-informed experts.

Second, we ask what political or economic system, or leadership, is prepared to handle the predicted disasters, or even capable of such action.

Third, this dire situation places an extraordinary responsibility on scientists to speak out candidly and accurately when engaging with government, business, and the public.

We especially draw attention to the lack of appreciation of the enormous challenges to creating a sustainable future. The added stresses to human health, wealth, and well-being will perversely diminish our political capacity to mitigate the erosion of ecosystem services on which society depends.

The science underlying these issues is strong, but awareness is weak. Without fully appreciating and broadcasting the scale of the problems and the enormity of the solutions required, society will fail to achieve even modest sustainability goals.

YMLADRIS: https://www.carbonbrief.org/analysis-the-climate-papers-most-featured-in-the-media-in-2020

ze zahadnych duvodu obrazek byl jen pozadi

Do we only have 60 harvests left? - Our World in Data
https://ourworldindata.org/soil-lifespans

Let’s focus on the ‘conventionally managed’ soils, shown in blue. These data are relevant for understanding many of the world’s farming practices. We will look at conservation techniques later.

Many of these soils are thinning; some very quickly. 16% have a lifespan of less than 100 years if they continue to erode at their current rates. This is not a local problem: there are examples of soils with lifespans shorter than a century on all continents, including the United States, Australia, Spain, Italy, Brazil and China. The longevity of these soils is concerning and we should be acting quickly to preserve them.

But the “60 harvests” claim is quite clearly false. More than 90% of conventionally managed soils had a ‘lifespan’ greater than 60 years. The median was 491 years for thinning soils. Half had a lifespan greater than 1,000 years, and 18% exceeded 10,000 years. There were also some soils that were not eroding at all. Where soil formation rates exceeded erosion rates, soils thickened.In fact, some were thickening – soil was forming quicker than it was eroding. In the bottom-right of the chart we see the rates of soil gain. 7% of conventionally managed soils were thickening.

If we were to keep our land completely bare – by removing any vegetation and preventing any natural regrowth through pesticides – our soils could erode more quickly. One-third (34%) of bare soils had lifespans less than 100 years.

There is no single figure for how many harvests the world has left because there is so much variation in the types, quality, and management of our soils. It’s just implausible that they would all be degrading at exactly the same rate. As these results show: some soils are eroding quickly while others are thickening

TUHO: tyhle tezit nebudou, tak by to melo bejt dobry

V Krkonoších loni vysázeli 39 000 stromků, většinou listnáče - Ekolist.cz
https://ekolist.cz/...ravodajstvi/zpravy/v-krkonosich-loni-vysazeli-39.000-stromku-vetsinou-listnace

LINKOS: tohle neuvěřitelný kvantum dřeva IMHO nejde produkovat udržitelným způsobem.

KEB: proto jsem říkal, že by EU měla vyžadovat certifikaci původu dřeva. Samozřejmě, že uhlobaroni co mají elektrárny na uhlí, je budou chtít používat dál a dávat tam štěpky. Dává to smysl, pokud sme schopni to dřevo produkovat, nedává to smysl, pokud to musíme vozit deštného pralesa, což platí ale i o té sóje.

České lesy se staly významným emitentem skleníkových plynů. Připadá vám to divné, když planetu mají od globálního oteplení zachránit právě lesy, které by pohltily CO2 z průmyslových zdrojů? Tak ale vězte, že takový mechanismus funguje jen dočasně. Dokud lesy přirůstají, skutečně CO2 využívají k fotosyntéze a růstu dřeva. Pokud však růst přestanou, a jsou vytěženy a zpracovány, stanou se vlastně zdrojem CO2 do ovzduší, protože většina dřeva je rychle zase spotřebována a CO2 uvolněn.

Jakub Hruška: České lesy se staly významným emitentem skleníkových plynů - Ekolist.cz
https://ekolist.cz/...ntare/jakubn-hruska-ceske-lesy-se-staly-vyznamnym-emitentem-sklenikovych-plynu

LINKOS: a my tady v evropě je k tomu kácení ještě víc motivujeme, abychom měli co pálit a hrajeme si na uhlíkovou neutralitu pálením dřeva. Ok. Tohle k té debatě o podpoře klimatických opatření veřejností patří taky, protože to nedává smysl.