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Biological control of introduced weeds in the 22 Pacific Island countries and territories (PICTs) began in 1911, with the lantana seed feeding fly introduced into Fiji and New Caledonia form Hawaii. To date, a total of 62 agents have been deliberately introduced into the PICTs to control 21 weed species in 17 countries.

Biological control of introduced weeds in the 22 Pacific island countries and territories (PICTs) began in 1911, with the lantana seed-feeding fly introduced into Fiji and New Caledonia from Hawaii. To date, a total of 62 agents have been deliberately introduced into the PICTs to control 21 weed species in 17 countries. A further two agents have spread naturally into the region. The general impact of the 36 biocontrol agents now established in the PICTs ranges from none to complete control of their target weed(s). Fiji has been most active in weed biocontrol, releasing 30 agents against 11 weed species. Papua New Guinea, Guam, and the Federated States of Micronesia have also been very active in weed biocontrol. For some weeds such as Lantana camara, agents have been released widely, and can now be found in 15 of the 21 PICTs in which the weed occurs. However, agents for other commonly found weeds, such as Sida acuta, have been released in only a few countries in which the weed is present. There are many safe and effective biocontrol agents already in the Pacific that could be utilised more widely, and highly effective agents that have been released elsewhere in the world that could be introduced following some additional host specificity testing. This paper discusses the current status of biological control efforts against introduced weeds in the 22 PICTs and reviews options that could be considered by countries wishing to initiate weed biological control programmes.

Biological control of weeds in Vanuatu began in 1935, with the introduction of the tinged Teleonemia scrupulosa to control Lantana camara. To date, nine biological control agents have been intentionally introduced to control eight weed species. Seven of these agents have established on their respective hosts while an eighth, Zygogramma bicolorata, an agent for Parthenium hysterophorus has only recently been released and establishment is unlikely.

Climate change-- our approach: The science of climate change : scale of the environment challenge ; Economics, ethics and climate change ; Ethical frameworks and intertemporal equity -- Impacts of climate change on growth and development: How climate change will affect people around the world ; Implications of climate change for development ; Costs of climate change in developed countries ; Economic modelling of climate-change impacts -- The economics of stabilisation: Projecting the growth of greenhouse-gas emissions ; Climate change and the Kuznets curve ; The challenge of stabilisation ; Identifying the costs of mitigation ; Macroeconomic models of costs ; Structural change and competitiveness ; Key statistics for 123 UK production sectors ; Opportunities and wider benefits from climate policies ; Towards a goal for climate-change policy -- Policy responses for mitigation: Harnessing markets for mitigation : the role of taxation and trading ; Carbon pricing and emission markets in practice ; Accelerating technological innovation ; Beyond carbon markets and technology -- Policy responses for adaptation: Understanding the economics of adaptation ; Adaptation in the developed world ; Adaptation in the developing world -- International collective action: Framework for understanding international collective action for climate change -- Creating a global price for carbon -- Supporting the transition to a low-carbon global economy -- Promoting effective international technology co-operation -- Reversing emissions from land use change -- International support for adaptation -- Conclusions : building and sustaining international co-operation on climate change.

The Review first examines the evidence on the economic impacts of climate change itself, and explores the economics of stabilising greenhouse gases in the atmosphere. The second half of the Review considers the complex policy challenges involved in managing the transition to a low-carbon economy and in ensuring that societies can adapt to the consequences of climate change that can no longer be avoided.