购买老域名_出售老域名_老站转让

高PR快排域名

On negative tech and global warming

We are warned that Melbourne and Sydney should prepare for 50-degree Celsius days under the Paris Agreement global warming limit of 2 degrees.
购买老域名

To avoid 2 degrees average global warming before 2100, widespread negative emissions technologies that remove CO2 from the air need to start by 2030 – in 11 years – ramping up to global net negative emissions by 2070.How big is this problem? “Since 1751, just over 400 billion metric tonnes of carbon have been released to the atmosphere from the consumption of fossil fuels and cement production.” Land use changes between 1850 and 2005 has contributed 150 billion metric tonnes of carbon.

Many methods, apart from the age-old photosynthetic method of plants, are urgently needed to reduce the CO2 load on the environment by extracting carbon dioxide from the atmosphere and somehow making it resiliently and sturdily solid.

Thus, the transformed CO2 can then be returned to the Earth via burial, or “geosequestration”,or used for building materials.

University of Newcastle engineers are piloting ways to take carbon dioxide and solidify it, in a process called mineral carbonation,creating carbonates and silica by-products that have the potential as concrete and plasterboard.

Elsewhere, carbon fibre is being made directly from atmospheric CO2 using a novel electrochemical method with solar power.

If we can find commercially practical methods to transform CO2 into a form suitable for geosequestration, then appropriate sites would need to be found.The manufacturing of sufficient solid stuff containing carbon to draw down 400 billion tonnes of carbon would be a stupendous operation.

We can imagine that people would choose to emplace such stuff near the point of manufacture, or other sites needing clean fill, to save on transport costs.

Imagine the Port of Newcastle unloading mineral carbonates?

Realistically, such negative emissions technologies must go with climate mitigation: reducing emissions of greenhouse gases and preventing deforestation.

With Nigel StaceEmeritus Professor Tim Roberts, School of Enviromental and Life Sciences, The University of Newcastle.

Comments are currently closed.