The ongoing global climate change (CC) has already caused a grave concern to the country's agriculture, irrigation, navigation, ecology, bio-diversity, weather, environment and underground water levels, concerned experts said. As a result, rainfalls, floods, cyclones, droughts, cold and hot spells, sea and surface warming, water contamination, water and soil salinity, degradation of aquatic systems, silting and drying up of rivers, lowering of underground water levels are being affected. The situation degrades faster because of melting ice due to temperature rise following huge emissions of the Green House Gases (GHGs) like Carbon Dioxide, Methane, Nitrous Oxide, Hydro- flouro-carbons, Per-flouro-carbons, Sulphur Hexa-fluoride etc. They blamed the industrialised nations, who are not taking adequate steps to reduce the threat of global CC to save the most affected poorer nations, the planet and its habitat from possible man-made devastations in future. The experts said this while expressing their views to the national news agency in recent days on the adverse impacts of ongoing global climate changes at alarming rates and the way forward to cope with the situation at the national and global prospects. The experts included Project Coordinator of Stress Tolerant Rice for Poor Farmers in Africa & South Asia (STRASA) programme Dr US Singh, its Consultant Dr MA Bari, Additional Director of the DAE's Rangpur Agriculture Zone Shakhawat Hossain, noted agri- scientists Dr MA Mazid, Principal Scientific Officer of Rangpur BJRI Dr Aiyub Ali, Director Resources and Environment of Rangpur- Dinajpur Rural service (RDRS) Dr Syed Samsuzzaman, Environmentalist and Head of Agriculture MG Neogi of RDRS, Rangpur Divisional Forest Officer Muhammad Abu Yusuf and agriculturists. The experts with both international and national reputes elaborately narrated the importance and chronological background that triggered to the global CC at alarming rates and its huge adverse impacts in the country, its agriculture and the world as a whole. They also narrated various national and international research analyses, findings, visible impacts and possible future consequences of CC with a series of coordinated suggestions to overcome the formidable threats. They said if the present degrading rate of CC could not be contained, one-fourth area of Bangladesh would be submerged under sea water by 2050 making 30 million people displaced and the country would alarmingly be prone to intense and frequent calamities. The adverse impacts of the ongoing CC might be unthinkable, so severe and million times worse than those might be caused by calamities like super cyclones, earthquakes, Sidr, devastating floods, tornadoes and the agri-sector might be collapsed totally. This will happen not only in Bangladesh, but also throughout the globe with various extents and intensities of possible devastations in different continents because of the ongoing global CC, they said. Drying and silting up of the rivers and abnormal lowering of underground water levels due to its huge lifting for Boro farming and complete drying up of dozens of rivers and tributaries have further added to the degrading situation in the country. "It also degrades the CC situation and causes grave concern to Bangladesh and seriously affects agriculture, irrigation, navigation, ecology, climate, environment, bio-diversity and even to the habitation and civilisations," they said. Besides, the CC that started long ago has already changed period of appearance of different seasons causing concern to the agriculture sector in recent decades and the sector might suffer further and total set back, they cautioned. They said such an adverse situation has already brought huge changes in the climatic patterns to experience extreme cold during the winters and extreme hot in the summers or even can severely change the appearance periods of the seasons harming agriculture. Huge area in the coastal belts have already been inundated due to rise in sea level with increasing salinity and the soil health has been suffering from chronic diseases due to deposition and accumulation of chemical pesticides, fertilisers and industrial wastages. The silting up of the riverbeds will be accelerated further causing untimely flash floods and massive erosion for unbridled rise of riverbeds from abnormal deposition of silts to reduce the cultivable land area for sand depositions. The experts said navigation has been remaining affected throughout the country for the past few decades, much ahead of the beginning of the dry seasons, as hundreds of shoals and chars emerge on the riverbeds. They expressed grave concerns that dozens of indigenous species of sweet water fishes, insects, birds and animals have already become extinct for complete drying up of the waterbodies, indiscriminate use of pesticides and lessening of forest areas. Because of the huge change in the overall climatic patterns, the seasonal rainfalls, floods, dry seasons, periods for sowing or planting the seeds and seedlings and harvesting are severely being changed affecting agro-productions. "We must take necessary steps right now to educate farmers about crop cultivations in all seasons keeping in view the negative impacts of the ongoing severe CC in the country and the world as a whole to keep agro-activities movable at any costs," they said. "The responsible rich nations must properly compensate us as for the situation and they must take effective steps right now for reducing the alarming threat of global CC to save the planet and its habitat from the possible man-made catastrophes," they said.