Category: Articles

Climate change puts us all in the same boat. One hole will sink us

admin /11 December, 2009

Climate change puts us all in the same boat. One hole will sink us all

Global warming does not respect borders. A mindset shift is required if world leaders are to save us from ourselves.

 

 

 

The UN climate change conference in Copenhagen offers the prospect of a robust political deal, endorsed by the world’s leaders and witnessed by the world’s people, that sets out clear targets and a timeline for translating it into law. To be a truly historic achievement, such a deal must do two things.

 

First, it must lay the basis for a global regime and subsequent agreements that limit global temperature rise in accordance with the scientific evidence. Second, it must provide clarity on the mobilisation and volume of financial resources to support developing countries to adapt to climate change.

 

The stakes are enormous. Economic growth has been achieved at great environmental and social cost, aggravating inequality and human vulnerability. The irreparable damage that is being inflicted on ecosystems, agricultural productivity, forests and water systems is accelerating. Threats to health, life and livelihoods are growing. Disasters are also increasing in scale and frequency.

DC Arc Faults and PV System Safety

admin /9 December, 2009

December 7, 2009

DC Arc Faults and PV System Safety

by Marv Dargatz, Enphase Energy Inc.

Within the PV industry, the risk presented by DC arc faults is gaining significant attention, and for good reason. The DC circuits within a PV installation can generate, and sustain, arcs of considerable intensity. Not only have these arcs started fires, but the intensive energy that generates these arcs also poses a significant risk to firefighters during their efforts to suppress the fire.

Reliable detection of arc faults is a serious challenge, and determination of the appropriate corrective action is difficult.  PV system design philosophy has a significant impact on both prevention and suppression of fires, with an increasing preference being given to AC-based systems that mitigate the risk of fire by avoiding distribution of high DC voltage and high DC current altogether.

Queensland residents want to cap population growth

admin /7 December, 2009

Queensland residents want to cap population growth

Article from: The Courier-Mail

 

Craig Johnstone and Natalie Gregg

December 06, 2009 11:00pm

MOST Queenslanders want the Bligh Government to cap southeast Queensland’s rampant population growth.

Results from an exclusive Galaxy poll for The Courier-Mail suggest that 60 per cent of Queenslanders want the Government to take steps to limit the region’s population growth explosion. A similar proportion say forecasts of six million southeast Queenslanders by 2050 would be too many.

 

An Exclusive Look at the New Siemens 3-MW Direct Drive Turbine

admin /4 December, 2009

December 3, 2009

An Exclusive Look at the New Siemens 3-MW Direct-Drive Turbine

Brande, Denmark [RenewableEnergyWorld.com]

Little over a year after Siemens erected its first 3.6-MW direct-drive “Proof of Concept” wind turbine, this November the company presented a new rather different 3-MW direct-drive concept. RenewableEnergyWorld.com was exclusively invited to the Brande HQ in Denmark to view the prototype and discuss the new turbine with Siemens CTO Henrik Stiesdal. A prototype was erected near Brande during the first week of December.

Our expectations were therefore that a direct-drive concept mainly offers a commercially viable alternative for large offshore turbines. However, we now have sufficient indications that the concept might also be feasible for the high-end high-volume market, and do hope that this machine will prove competitive with our 2.3-MW volume turbine series.’

Rich nations to offset emissions with birth control

admin /3 December, 2009

Rich nations to offset emissions with birth control

Radical plan to cut CO2 argues that paying for family planning is developing world is the best bet

Babies rest at the Pouponniere facility in Dakar, Senegal

Babies in Dakar, Senegal. The cost-benefit analysis commissioned by the trust claims that family planning is the cheapest way to reduce carbon emissions. Photograph: Georges Gobet/AFP/Getty Images

Consumers in the developed world are to be offered a radical method of offsetting their carbon emissions in an ambitious attempt to tackle climate change – by paying for contraception measures in poorer countries to curb the rapidly growing global population.

Designs for new UK nuclear reactors are unsafe

admin /27 November, 2009

Designs for new UK nuclear reactors are unsafe Terry Macalister 27th November, 2009 Major setback for nuclear energy plans as watchdog’s report finds flaws in US and French models Britain’s main safety regulator threw the government’s energy plans into chaos tonight by damning the nuclear industry’s leading designs for new plants. The Health and Safety Continue Reading →