Climate change in the news (Apr 10 - 16)
Climate change in the news (Apr 2 - Apr 9, 2010)
|Two macaws in the Amazon.
Photo © istockphoto.com
Although the United Nations climate change conference in Copenhagen badly failed to achieve legally binding agreements, including on the specific mechanism of REDD (Reduction of Emissions from Deforestation and Forest Degradation), there was nevertheless a general sense that this mechanism is something worth pursuing. Meetings and discussions continued to take place after the conference was over, and a fund of US$ 10 billion is being set up to promote initial steps for tropical developing countries to prepare for REDD.
What lessons can be learned from the Brazilian Amazon, where deforestation rates have been steadily declining for 5 years?
Compared to estimates of land-cover change emissions from elsewhere in the tropics, estimates in the Brazilian Amazon tend to be relatively more certain because they are calculated from annual, satellite-based monitoring of land cover change for over two decades for the Brazilian portion of the Amazon. That is the work of the PRODES Project carried out by the National Institute of Space Research (INPE) of Brazil.
Deforestation in the Amazon changes a lot from year to year. The proximate causes are not totally known. They have to do with economic drivers such as prices of commodities (beef, soy, etc.), the opening of roads, but they are also influenced by the effectiveness of law enforcement to curb illegal deforestation.
The latter may have played a key role in reducing deforestation in the last 5 years. During that period, annual deforestation rates in the Brazilian Amazon plummeted from over 27 thousand km2 (August 2003-July 2004) to around 7 thousand km2 (August 2008-July 2009), an amazing 74% reduction over 5 years!
|Futuristic water design that would provide water for food in the desert, featured in The Guardian in 2008. Photograph: Exploration Architecture.|
“What are the new developments in water? Are there new technologies that developing countries could use to bypass expensive and cumbersome systems? What’s the next big thing that could solve the water crisis?” Politicians and the media often ask experts for new ideas to make water “interesting”. Yet, on the whole, water systems constructed today use much of the same technology they did 100 years ago.
"These historic new standards set ambitious, but achievable, fuel economy requirements for the automotive industry that will also encourage new and emerging technologies. We will be helping American motorists save money at the pump, while putting less pollution in the air." This is how Transportation Secretary Ray LaHood announced the new national standards for passenger cars and light trucks today.
People skeptical of hearing water experts talking about water crises put their faith in the human capacity to innovate. They point to the rapid decline in costs of taking the salt out of sea water as evidence that – when we really have to – we will innovate and make sure we can meet our water needs.
Necessity is the mother of invention. Israel, one of the driest countries in the world, has invested heavily in non-conventional sources of water. Desalination currently provides around 40 percent of Israel’s municipal water supply and the plan is for this source to provide 70 percent by 2015. In March, a team from the the World Bank's WDR2010 and Middle East North Africa units visited the largest operational reverse osmosis desalination plant in the world, in Hadera.
Desalination does indeed have potential to meet the municipal water needs of many people in the world – but only those who live near the sea.
Costs have come down to about $0.55 per cubic metre, about half what it was a decade ago. How have engineers managed this? Economies of scale are important. They have also been able to save on costs by designing an efficient system within the plant and by clever energy saving technology. Will the costs come down much further? About 10% say the Israeli experts. Not more.
Israel’s very careful management of every drop of water has led to an interesting problem.
Climate change in the news (Mar 20- 26, 2010)
The perceived communications fiasco of the last few months about what is known and not known about the science of climate change led one of my students, Andy Lubershane, to try a different approach—animation. His effort is meant to communicate in a clear, humorous, memorable way the reasons why we need to put a price on greenhouse gas emissions.
Andy is one of 160 Master’s students using the World Development Report 2010 as a textbook on Environmental Assessment at the University of Michigan.
Today is World Water Day, a good time to ponder the impacts of global climate change on water availability and quality. Julia Bucknall was part of a team of experts from the WDR2010 and the World Bank's Middle East and North Africa region visiting Israel last week to learn about innovation in water. The blog below is the first in three installments.
Can high-tech agriculture help developing countries get more from their water?
Israel invented drip irrigation, a technology that has spread rapidly since its introduction in the 1960s and which is widely touted as a key way for countries to close their water gap and be more adapted to climate change. It certainly does reduce evaporative losses, is often associated with a switch to high-value crops, and reduces fertilizer use when liquid fertilizer is added to the mix and delivered precisely to the root of the plant (a process that delights in the name “fertigation”). We often see important productivity gains.
Yet it’s not as simple as that.