More proof. A walk-in-the-park really can boost our feelings of well-being - especially when there are wild birds to sing to us along the way! Researchers.

It's not exactly "news" that spending time in nature benefits human health and well-being. But an experiment conducted by social scientists along some mountain trails in Colorado shows - it's not just the wind in our faces or the grandeur of the scenery we need to thank. 

                                            by Larry Powell

A PinP photo.

Tough Times for Animal Travellers

Committee on the Status of Endangered Wildlife in Canada. (COSEWIC)

The Blackmouth (Oncorhynchus tshawytscha) a type of Chinook. 

Image by Animal Diversity Web.

After maturing at sea, Chinook Salmon on Canada's West Coast swim back to their natal streams to spawn. Twenty-eight populations of Chinook Salmon live in Southern British Columbia, each with different habitats and survival strategies. Chinook Salmon face many threats in both fresh and saltwater, including climate change and detrimental effects from hatchery fish. At the current meeting, COSEWIC considered the 12 populations of Chinook Salmon most impacted by hatcheries: four were designated Endangered, three Threatened, and one Special Concern, while one was deemed Not at Risk. Three remote populations were determined to be Data Deficient, and will require additional research before being re-assessed. Details here.

If we are to stabilize world food production, we not only need a wider variety of crops, but ones that are sown and harvested at different times, too.

SCIENCE DAILY

Harvesting of vast fields of food crops like this one in Manitoba, Canada, have had to be delayed over winter due to unseasonably bad weather in recent years. A PinP photo.

Securing food supplies around the globe is a challenge facing humanity, especially in light of the predicted increase in the world's population and the effects of climate change. Greater crop diversity in agriculture is seen as a stabilizing factor for food security. Yet crop diversity alone is not sufficient. Researchers now argue that it's also essential that crops differ in their temporal production patterns.Story here.

Human-made materials outweigh living biomass

                   Journal Nature

A PinP photo.

The year 2020 may mark the crossover point when human-made mass surpasses that of living biomass according to a study published in Nature this week. The mass embedded in human-made items, such as buildings, roads and machines, has doubled every 20 years for the past 100 years.

These findings underscore the increasing impacts that humans have on Earth.

Since the first agricultural revolution humans have halved plant biomass, from around 2 teratonnes (2,000,000,000,000 tonnes) to the current value of around 1 teratonne, through land-use changes such as agriculture and deforestation. The increasing production and accumulation of human-made objects (termed anthropogenic mass) has also contributed to a shift in the balance between living and human-made mass.

Ron Milo and colleagues estimate changes in global biomass and human-made mass from 1900 to the present day. They show that at the beginning of the twentieth century, the mass of human-produced objects was equal to around 3% of total biomass, whereas today human-made mass exceeds the overall global biomass, weighing in at around 1.1 teratonnes. Over this period, overall biomass decreased slightly, whereas anthropogenic mass has increased rapidly and is now being produced at a rate of more than 30 gigatonnes (30,000,000,000 tonnes) per year. This means that for every person in the world, more than their body weight in human-made objects is being produced each week.

Buildings and roads make up the majority of human-made mass; other examples include plastics and machines. Changes in the composition of this mass correspond to specific construction trends, such as the shift from using bricks to concrete in buildings from the mid-1950s and the use of asphalt for road paving in the 1960s. In addition, shifts in the total anthropogenic mass are linked to major events, such as continuous increases in construction after World War II (a period known as the Great Acceleration).

The exact timing of crossover is sensitive to definitions, so there may be some variability in the estimates, the authors note. They use dry-weight estimates (excluding water), but they suggest that wet-mass estimates or different definitions of mass categories could still place the transition in mass balance within the past, present or future decade.

If current trends continue, human-generated mass is expected to exceed 3 teratonnes by 2040.

The Big Banks’ Green Bafflegab

The Tyee

Profit, profit, profit.

Look behind their pro-climate ads and do what they do. Follow the money. Story here.

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Humanity is waging war on nature, says UN secretary general

António Guterres lists human-inflicted wounds on natural world in stark message

World is ‘doubling down’ on fossil fuels despite climate crisis – UN report

Pumpjacks dot the landscape in southwestern Manitoba. A PinP image.

New UN climate report is bleak, but there's a solution - trees.

CONSERVATION INTERNATIONAL

(Note - this report came out last year. But it bears repeating.)

Humanity must overhaul the global food system to stop the climate breakdown, according to a dire report released in 2019. Story here.

When trees are grown together with crops and livestock, as an integrated production unit, numerous benefits can be observed. Trees have been shown to indirectly increase crop yields, improve soil and water quality, increase biodiversity, reduce greenhouse gas emissions, and increase carbon sequestration. (Source - Climate Connection.) Scenes such as this, where trees were planted in rows, as "shelterbelts," used to be common on the Canadian prairies. But, no more.

Many farmers are now slashing and burning such trees, so their huge farm machines can operate more efficiently, such as this one in southwestern Manitoba. A PinP photo.