Credit NASA Goddard Space Flight Center Image by Reto Stöckli (land surface, shallow water, clouds). Enhancements by Robert Simmon (ocean color, compositing, 3D globes, animation). Data and technical support: MODIS Land Group; MODIS Science Data Support Team; MODIS Atmosphere Group; MODIS Ocean Group Additional data: USGS EROS Data Center (topography); USGS Terrestrial Remote Sensing Flagstaff Field Center (Antarctica); Defense Meteorological Satellite Program (city lights). This spectacular “blue marble” image is the most detailed true-color image of the entire Earth to date. Using a collection of satellite-based observations, scientists and visualizers stitched together months of observations of the land surface, oceans, sea ice, and clouds into a seamless, true-color mosaic of every square kilometer (.386 square mile) of our planet. These images are freely available to educators, scientists, museums, and the public. This record includes preview images and links to full resolution versions up to 21,600 pixels across. Much of the information contained in this image came from a single remote-sensing device-NASA’s Moderate Resolution Imaging Spectroradiometer, or MODIS. Flying over 700 km above the Earth onboard the Terra satellite, MODIS provides an integrated tool for observing a variety of terrestrial, oceanic, and atmospheric features of the Earth. The land and coastal ocean portions of these images are based on surface observations collected from June through September 2001 and combined, or composited, every eight days to compensate for clouds that might block the sensor’s view of the surface on any single day. Two different types of ocean data were used in these images: shallow water true color data, and global ocean color (or chlorophyll) data. Topographic shading is based on the GTOPO 30 elevation dataset compiled by the U.S. Geological Survey’s EROS Data Center. MODIS observations of polar sea ice were combined with observations of Antarctica made by the National Oceanic and Atmospheric Administration’s AVHRR sensor—the Advanced Very High Resolution Radiometer. The cloud image is a composite of two days of imagery collected in visible light wavelengths and a third day of thermal infra-red imagery over the poles. Global city lights, derived from 9 months of observations from the Defense Meteorological Satellite Program, are superimposed on a darkened land surface map. Metadata 		Sensor Terra/MODIS 		Visualization Date 2002-02-08 			.	All Sensors MODIS 			.	All Satellites Terra MODIS 	.	All Categories Collections Blue Marble Blue Marble 2002

Söndag den 22 april är det Earth Day – Jordens dag – 2018. Årets tema är ”End Plastic Pollution” och syftar till att uppmärksamma och stoppa den miljöförstöring som orsakas av plastavfall. Människors inställning och beteende i relation till plast måste förändras för jordens skull. Plast förorenar våra marker och hav, skadar växt- och djurliv samt försämrar vår hälsa.

Varje år slängs uppskattningsvis 4500 miljarder fimpar på marken i världen. Enligt stiftelsen Håll Sverige Rent slängs 1 miljard av dessa fimpar i Sverige. Cigarrettfilter tillverkas av ett slags plast, cellulosaacetat, som kan ta 12 år för naturen att bryta ner. Genom att minska tobaksbruket kan vi tillsammans minska mängden plast som förorenar vår jord!

För att läsa mer om Earth Day, klicka här.

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