Bangkok, Khon Kaen, and Sukhothai Provinces are the ten provinces that most benefit agriculturally from climate change. Agricultural chemicals According to the Thai government's The Eleventh National Economic and Social Development Plan (2012-2016), Thailand is number one in the world in the application of chemicals in agriculture. The report stated that, "The use of chemicals in the agricultural and industrial sectors is growing while control mechanisms are ineffective making Thailand rank first in the world in the use of registered chemicals in agriculture." In 2018 Thai researchers and the Health Ministry called for an outright ban on the use of the agricultural chemicals paraquat, glyphosate ("Roundup"), and chlorpyrifos. Paraquat and glyphosate are widely used herbicides. Chlorpyrifos is a pesticide. All are known to hazardous to humans and the ecosystem. The ban is opposed by agricultural interests, the Agriculture Ministry and the Industry Ministry who claim that a paraquat ban alone would lead to 40 billion baht in losses for the agricultural sector. Paraquat, whose use is banned by 47 to 53 nations (sources vary), is permitted for agricultural use in Thailand. It is sold under various trade names: Crisquat, Cyclone, Dextrone, Gramoxone Extra, Herbaxone, Ortho Weed and Spot Killer, and Sweep. Thailand imported 30,441 tonnes of paraquat in 2015, 31,525 tonnes in 2016, and 44,501 tonnes in 2017. In 2011 and 2012, researchers in Nan Province found paraquat contamination in all vegetables and fish sampled. In Lampang and Lamphun Provinces in 2017, tap water in 21 communities was found to be contaminated with paraquat. Vegetable samples from the area were also contaminated. In May 2018 the National Hazardous Substance Committee (NHSC) voted 18–6 in favor of allowing the continued use of the three toxic chemicals, albeit with tighter controls. The committee said there were insufficient studies confirming they were health hazards. About 17 countries limit the use of all three chemicals. In February 2019, three members of a panel charged with toxic chemical control resigned from the panel due to interference by farm chemical producers. On 22 October 2019, the 26-member National Hazardous Substances Committee (NHSC) changed paraquat, glyphosate ("Roundup"), and chlorpyrifos from Type 3 toxic substances to Type 4, effectively prohibiting their production, import, export, or possession. Their use will be prohibited as of 1 December 2019. On 27 November 2019, the NHSC amended that timetable, moving the date for the ban of paraquat and chlorpyrifos to 1 June