31:[] 2f:{"title":"Emissions of driving vs walking & drinking milk","cells":[{"id":0,"value":"md`# Emissions of driving vs walking & drinking milk\n\nIf you walk ${(walking_distance*5/8).toFixed(1)} miles, you burn ${calories_burned_while_walking.toFixed(0)} calories.\n
\nThis means you need to drink ${(kg_of_milk_to_replace_calories*1000).toFixed(0)} ml of whole milk to replace those lost calories, giving off ${(walking_emissions * 1000).toFixed(0)} g of CO2-equivalent.\n
\n\nIf instead, you drove that same distance, your car would give off ${(driving_emissions*1000).toFixed(0)} g of CO2-equivalent.\n\nTherefore,** ${driving_emissions > walking_emissions ? \"driving 🚗\" : \"walking 🚶\"}** gives off more emissions.\n\nPlay with the figures below to suit your own lifestyle.\n\nWhy make such a silly calculator? To refute the misleading claims in [this NYT article](https://tierneylab.blogs.nytimes.com/2008/02/25/how-virtuous-is-ed-begley-jr).\n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":4,"value":"viewof mpg_of_car = slider({min: 0, max: 100, value:30, description: \"Fuel efficiency of car in miles/gallon\"})","pinned":false,"hidden":false,"mode":"ojs"},{"id":128,"value":"viewof distance_in_miles = slider({min:0, max:100, value: 1.5, description: \"Walking/driving distance in miles\"})","pinned":false,"hidden":false,"mode":"ojs"},{"id":132,"value":"viewof body_weight = slider({min:40, max: 200, value: 65, description: \"Body weight in kg\"})","pinned":false,"hidden":false,"mode":"ojs"},{"id":172,"value":"viewof milk_emissions_per_kg = radio({options: [{label: \"Irish grass-fed\", value: 0.837},\n {label:\"UK factory farmed\", value: 0.884},\n {label: \"US factory farmed\", value: 0.898}], \n value: 0.898,\n description: \"Emissions for different dairy systems\"})","pinned":false,"hidden":false,"mode":"ojs"},{"id":175,"value":"viewof calories_per_kg_milk = radio({options: [{label: \"1% fat\", value: 420},\n {label:\"2% fat\", value:500},\n {label: \"4% fat\", value: 640}], \n value: 640,\n description: \"Type of milk drunk after walk\"})","pinned":false,"hidden":false,"mode":"ojs"},{"id":135,"value":"md`Everything below this line does not need to be changed\n

`","pinned":false,"hidden":false,"mode":"ojs"},{"id":14,"value":"walking_distance = distance_in_miles * 8/5 // km","pinned":false,"hidden":false,"mode":"ojs"},{"id":16,"value":"walking_speed = 4 // km/h","pinned":false,"hidden":false,"mode":"ojs"},{"id":11,"value":"walking_time = walking_distance/walking_speed // hours","pinned":false,"hidden":false,"mode":"ojs"},{"id":62,"value":"driving_emissions = (walking_distance*5/8)/mpg_of_car * lb_co2_per_gallon_petrol * 0.454","pinned":true,"hidden":false,"mode":"ojs"},{"id":65,"value":"walking_emissions = kg_of_milk_to_replace_calories * milk_emissions_per_kg","pinned":true,"hidden":false,"mode":"ojs"},{"id":23,"value":"md`Calories burnt formula from [here](http://www.shapesense.com/fitness-exercise/calculators/walking-calorie-burn-calculator.shtml)`","pinned":false,"hidden":false,"mode":"ojs"},{"id":6,"value":"calories_burned_while_walking = (0.0215 * walking_speed**3 - 0.1765 * walking_speed**2 + 0.8710 * walking_speed + 1.4577) * body_weight * walking_time","pinned":false,"hidden":false,"mode":"ojs"},{"id":28,"value":"md`CO2-equivalent emissions of milk from [here]( http://eprints.nottingham.ac.uk/46395/8/Footprint%201-s2.0-S0022030214000319-main.pdf).`","pinned":false,"hidden":false,"mode":"ojs"},{"id":75,"value":"kg_of_milk_to_replace_calories = calories_burned_while_walking/calories_per_kg_milk","pinned":false,"hidden":false,"mode":"ojs"},{"id":60,"value":"md`Petrol emissions from [here](https://www.eia.gov/tools/faqs/faq.php?id=307&t=11)`","pinned":false,"hidden":false,"mode":"ojs"},{"id":45,"value":"lb_co2_per_gallon_petrol = 19.6","pinned":false,"hidden":false,"mode":"ojs"},{"id":185,"value":"html`CSS Styles\n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":101,"value":"import {slider, radio} from \"@jashkenas/inputs\"","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}