Google Global Impact Challenge: technology to tackle the world's toughest problems The loneliness suffered by many older people in the UK is the problem that Age UK wants to take on by teaching the elderly to use technology. Targeting 16,000 people in 25 locations, the Age UK program would last 18 months and aims to provide a "lasting legacy" to older people who will learn to socialise and connect online. vInspired vInspired is taking the model of the temp agency and extending it to short-term, paid placements for the million 16-24 year-olds looking for work in the UK via its Task Squad digital platform. It would target 275,000 young people over a three year period. Amnesty International A mobile alert system for activists would warn subscribers through a "panic button" likely triggered by smartphone app that a situation likely to cause them harm was arising nearby. The system would aim to reach 75,000-100,000 people within two-and-a-half years. War Child War Child plans to use anonymous crowdsourced mapping to show the true impact of rape against children in the Democratic Republic of Congo. Using information collected through texts and helplines, War Child would respond quickest where help is most needed. Over 18 months, this project would provide counselling for 4,500 young people and hopefully prevent the rape of an estimated 9,000 children. WIth almost a million young people in the UK looking for work, MAKLab would seek to give them all access to the latest tech to start their own manufacturing businesses, removing the "prohibitive" costs associated with starting up companies. MAKLab claims it would train more than 600 16-25 year olds over three years in manufacturing everything from jewellery to new gadgets, and support 150 small and medium enterprises. The Zoological Society of London (ZSL) would protect threatened wildlife with its digital camera traps. Sensors will be able to transmit alerts of gunfire, vehicle movement and human presence, in an attempt to reduce poaching incidents in a threatened Kenyan protected area by 50 per cent, providing greater protection for endangered species. Integrity Action The £500,00 prize money would go to an app that aims to help more than 500,000 people check information to hold government and development agencies accountable, and to combat the £8bn lost to corrupt governments annually. Data would be shared with government, contractors, the media and development agencies who can resolve reported issues, with training of 2,000 volunteers in seven countries to allow citizens to fix infrastructure problems themselves, Integrity Action claims. Pennies The Pennies charity aims to raise £7 million in three years by allowing consumers to drop digital "pennies" when paying by debit or credit card. With a system similar to that used by restaurants for tipping, Pennies would make donating to charity as simple as entering a number while paying for goods SolarAid More than 110 million African households have access only to expensive and polluting kerosene lamps, but SolarAid wants to create a "solar hub" for communities in Tanzania, distributing lighting and providing job opportunities that could save £196m and reduce respiratory illness.