31:[{"id":"4e099ed6e39834280f75079cd2b8d27c356176d130b5db9ced36f9ac0cbecd90c47417046a83f15d28c6857a32cd829c40b4d5ce16f07581dd97a4e43e98905f","href":"https://static.observableusercontent.com/files/4e099ed6e39834280f75079cd2b8d27c356176d130b5db9ced36f9ac0cbecd90c47417046a83f15d28c6857a32cd829c40b4d5ce16f07581dd97a4e43e98905f","name":"car_co2_emissions@1.csv","type":"text/csv","lastModified":1631008201187.879,"size":1024}] 2f:{"title":"CO2 emissions from cars","cells":[{"id":0,"value":"# CO₂ emissions from cars","pinned":false,"hidden":false,"mode":"md"},{"id":155,"value":"Use this tool to find out how much carbon dioxide your car emits over the course of a year.","pinned":false,"hidden":false,"mode":"md"},{"id":17,"value":"viewof segment = Inputs.select(data.map(d => d.segment), {sort: false, unique: true, label: \"What kind of car do you drive?:\"})","pinned":false,"hidden":false,"mode":"ojs"},{"id":196,"value":"

e.g. ${selected.map(d => (d.example))}

","pinned":false,"hidden":false,"mode":"html"},{"id":112,"value":"viewof fuel = Inputs.radio([\"Diesel\", \"Petrol\"], {value: \"Diesel\", label: \"and the fuel type?:\"})","pinned":false,"hidden":false,"mode":"ojs"},{"id":62,"value":"viewof distance = Inputs.range([1000, 20000], {value: 7400, step: 100, label: \"What is your average annual mileage:\"})","pinned":false,"hidden":false,"mode":"ojs"},{"id":167,"value":"

The estimated average annual car mileage in England in 2019 was 7,400 miles (DfT, 2019).

","pinned":false,"hidden":false,"mode":"html"},{"id":38,"value":"

Your vehicle will emit approximately ${d3.format(\",.0f\")(selected_emissions)} kg CO₂e over the course of a year.

","pinned":false,"hidden":false,"mode":"html"},{"id":345,"value":"

A mature tree can absorb around 22 kg of CO₂* per year (EEA, 2011). Therefore, you would need to plant...

\n \n${Array(+(selected_emissions/22).toFixed(0)).fill(0).map(d => tree).join(\"\")} \n\n

${(selected_emissions/22).toFixed(0)} trees per year in order to cover these emissions.

","pinned":false,"hidden":false,"mode":"html"},{"id":260,"value":"

*This will depend on the type of tree, where it is planted and the amount of space it has to grow.

","pinned":false,"hidden":false,"mode":"html"},{"id":146,"value":"
\n**Sources**: \n\n- BEIS: Government greenhouse gas conversion factors for company reporting, 2020\n- DfT: National Travel Survey, 2019\n- EEA: Forests, health and climate change, 2011","pinned":false,"hidden":false,"mode":"md"},{"id":13,"value":"---\n## Appendix","pinned":false,"hidden":false,"mode":"md"},{"id":10,"value":"import {Plot, d3} from \"@observablehq/plot\"","pinned":false,"hidden":false,"mode":"ojs"},{"id":26,"value":"import {Text} from \"@observablehq/inputs\"","pinned":false,"hidden":false,"mode":"ojs"},{"id":139,"value":"html``","pinned":false,"hidden":false,"mode":"ojs"},{"id":3,"value":"data = d3.csvParse(await FileAttachment(\"car_co2_emissions@1.csv\").text(), d3.autoType)","pinned":false,"hidden":false,"mode":"ojs"},{"id":20,"value":"selected = data.filter(d => d.segment === segment && d.fuel === fuel)","pinned":false,"hidden":false,"mode":"ojs"},{"id":210,"value":"selected_emissions = selected.map(d => (d.emissions*(distance)));","pinned":false,"hidden":false,"mode":"ojs"},{"id":276,"value":"tree = \"🌳\"","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}